Electric pump



No. 6I8,404. Patented Jan. 3|, |899.

C. EICKEMEYER.

ELECTRIG PUMP.

(Application Bled Jan. 22, 1898.) (No Model.) 6 Sheets-Sheat I.

Patented lan. 31,1899.

C. EICKEMEYER. ELECTRIC P UMP. [Application led Jan. 22, 1898.) (No Model.) 6 Shady-Sheet 2.

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No. sis,4o4.

C. EICKEMEYER.

ELECTRIC PUMP.

(Application iled Jan. 22, 1898.)

(Nu Model.)

W/TNESSES Patented lan. 3|, l899. C. EICKEMEYEB.

ELECTRIC PUMP. Appumm med Jan. 22, 189s.)

6 Sheets- Sheet 4.

(No Model.)

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(Application mad am. 22, 159s.)

6 Sheets-Sheet 5.

(No Model.)

No. 6I8,404. Patented lan. 3|, |899.

' C.. EICKEMEYER.

ELECTRIC PUMP (Application led'Jan. 22, 1898.)

6 Sheets-@Sheet 6.

(Np Model.)

jig.- 12. I

MM S nO i @MJ W 2M 5J B Y Ti i E UNITED STATES 4'PATENT OFFICE.

vCARL EICKEMEYER, OF YONKERS, NEW YORK.

ELECTRIC PUMP.

SPECIFICATION forming part of Letters Patent No. 618,404, dated January 31, 1899.

Application filed January 22, 1898. Serial No. 667,583. (No model.)

T0 all whont t 77mg/ concern.-

Be it known that I, CARL EICKEMEYER, a citizen of the United States, residing at Yonkers, in the count-y of Westchester and'State of New York, have invented certain new and useful Improvements in Electric Pumps, of which the following is a specification.

The present invention relates to electric pumps or pumping machinery in which an electric motor forms the support of the pump and which is directly connected to the same by means of a worm or gear in such manner as to obviate the necessity of introducing relief-valves and by which is produced as highly an efficient pumping-machine (with a flexible coupling between the pump and the motor) as that found in the belt-connected pumps, whereby all jars from water-hammer, slamming of the pump-valves, dac., are not directly transmitted to the motor through the connecting driving mechanism. This feature of the invention not only insures steady operation, but greatlyincreases the life of the machine and at the same time allows the motor to be started without load, thereby taking the smallest possible amount of starting-current. The load is gradually applied to the motor as the speed increases, the maximum load being received at the time that the maximum speed is attained. To reach thedesired result, I have devised lrelief-springs, which are carried by a worm-shaft and permit the axial motion of theworm, which is, as it were, a combination of the motion of the worm and that of a rack. This axial rack motion is independent of the rotation of the armature of the motor, which armature is ymounted on a sleeve in which the worm-shaft is feathered. V Said independent rack motion is proportionate to the load applied to the motor and which I use as a dynamometric regulation for the motor in either automatically varying a set of resistances in the armature-circuit or automatically changing the direction and intensity, or both, of the series field. Should the motor be stopped with one of its relief-springs contracted under load, the current in the armature is automatically changed through the medium of a reversing starting-switch before the pump can again be started. By starting the motor in the opposite direction all the expanding motion of the compressed spring and the contracting motion of the opposite spring give sufficient range to start the motor without load and to reach its highest speed by the time the maximum load is applied. At the time the maximum load is reached the normal running speed is also reached, the armature-resistance has been gradually cut out, and the counter electromotive force has risen to its maximum degree and has cut down the armature-current to a safe limit. Should the load for any unforeseen reason loe suddenly thrown on the motor at any time, a set of safetyresistances are thrown into the armature-circuit in order that the current in the armature may not be suddenly increased by a consequently sudden decrease. of speed. On the other hand, should at any time the load be suddenly taken off the motor the speed will remain practically constant, as the armature-resistance is automatically thrown in the circuit before the armature can respond to any sudden decrease in the load.

The series regulation is used in a modified system of regulation in which the coils at starting exert a m'agnetizing effect on the armature and are gradually cut out as the motor rises to speed, while at the time the normal running speed is reached the series coils are cut out. In this system of regulation should the load be suddenly increased the series coils which have been previously cut out are at once thrown in, but in this instance exert a demagnetizing effect on the armature, which lowers the counter electromotive force, increases the armature-current,

and thereby raises the speed. On the otherV hand, when the load is suddenly decreased the series coils are thrown in, exerting a magnetizing effect onthe armature,which in turn increases the counter electromotive force, thereby reducing the current in the armature and lowering the speed to its normal rate. Vhen the motor is running at no load, the magnetization is at its maximum.

A combination of both regulation devices might successfully be used; butfor simplicity of construction either one or the other can be used.

Another novel feature of the constructionnamely, that of the motor-is in the winding of the fieldcoils, which in the shunt-'field are wound so that the outer portions of the coils IOO t i y 618,464

are approximately one-half the thickness or horizontal width of the inside portions of the coils: This allows the attening of the coils on the inside to get the motor as thin as is desirable and at the same time makes the outside wires of the outer side of the coils effective, which would otherwise be ineffective, in producing magnetic lines of force in the field-core. The series regulating-coils are made rectangular without bend and directly niagnetize or demagnetize the armature, as thecase may be. The worm and gear run entirely in oil, the gear-casing being cut away in the center to allow the parts of the crankshaft which are carried by the gear to be attached to either side of the gear. The gear is provided on either side with a groove which prevents any oil from running out onto the cranks, the oil finding its Way back to the well in which the Worm runs.4 The jars,which would otherwise exert undue wear on the worm and gear, are taken up by the reliefsprings and thus prevent the lubricant from being forced out from between the worm and gear. The disks forming the supports of the relief-springs are provided with frictionless bearings to insure the greatest possible degree of sensitiveness between the worm-shaft and the armature-sleeve in which the wormshaft is fitted, so as to have an axial or rack motion only with relation to the same, the independent rotary motion being prevented by a feather, which might also have a series of balls on either side of it to produce a frictionless bearing for the same.

In order that my invention may be more fully understood, I will now proceed to de scribe thesame with reference to the accompanying drawings, in which- Figure lis a vertical longitudinal section of my improved electric pump, parts being in elevation and parts broken away. Fig. 2 is a plan view of the electric pump, parts being in section and parts removed to show underlying parts. The gear is here sectioned horizontally through the axis of the crankshaft to show the casing, the oil-grooves in the gear, and the construction of the cranks. Fig. 3 is an end elevation looking toward the motor. Fig. et is a vertical transverse section on line et 4 of Fig. l. Fig. 5 is a transverse section through the cross-head guide-support. Fig. G is an end elevation, parts being broken away and parts in section, of the worm-well, gear-casing,and bracket supporting the bearings for the gear, worm-shaft, and crankshaft. Fig. 7 is a side elevation, parts being broken away, of the resistance-box, upon which is mounted the starting and reversing switch. Fig. 8 is a rear elevation of the same, parts of the switch being removed. Fig. 9 is a plan view of the starting and reversing switch, partly broken away. Fig. 10 is a vertical central section of the starting and reversing switch, taken through the reversinglever. Fig. l1 is a diagrammatic view of the electric connections, showing the generator, motor reversing and starting switch, and safety armature-resistance,which is regulated by the motor dynamometrically; and Fig. l2 is a similar diagram in which the safety series coil is regulated dynamometrically.

Similar let-ters and numerals of reference indicate corresponding parts.

Referring to the drawings, A represents the pump-casing, which contains suction-valves a and delivery-valves a', which are opened and closed through the medium of the action of the plungers acarried by the plunger-rods a4 a5, which are respectively fastened to the cross-heads a and a7. (See particularly Figs. l. and 2.) The said cross-heads a6 and a7 are reciprocated in guides as a9 and n10 a, respectively, which are bolted to guide-support B by means of bolts b. The support B is held rigidly to the pump-casing A by means of the piston-head nuts b2, while on the opposite end cross-head support B is supported by bolts b3, which pass through flange CX of the worm and gear casing C, which is composed of an upper shell C', provided with flange C2, which is secured to flange C3 of the lower shell C4 by means of bolts C5. The

lower shell C4 of the worm and gear casing C carries on each side brackets C and C7, respectively, upon which are mounted boxes C8 and C9 by means of bolts C10. The boxes C8 and C9, respectively, carrybushings C11 and C12, which are clamped in the boxes by means of bolts C13. The bushings C and Cm form bearings for the crank-shaft D, which is composed of three parts d, d', and cl2, said shaft-section d2 carrying a crank cl3, which carries a crank-pin d4, that is held rigidly to crank d5 and gear E by means of nut and washer d and d?, respectively. The inner end of said crank-pin d4 is preferably made slightly tapering, so that it can bind more firmly in the crank d5 and the gear E. Said crank d5 is also carried by the shaft-section d', upon which is mounted the gear E, which is made of the shape as shown in cross-section,so as to be as light as possible. The gear E is provided with annular oil-grooves e and e', formed at each side thereof near the peripheral teeth, which grooves prevent any oil from running out onto the cranks and cause the oil to find its way back into the worm-well shell C14. Shaft d also carries crank d8,which in turn is fastened to gear E by means of crank-pin d in the manner similar to that already shown in relation to crank-pin d, said crank-pin di being carried by crank d10, which is rigidly carried by shaft-section d.

Upon the crank-pin dg, which is arranged at an angle of ninety degrees in advance of crank-pin d4, are carried boxes d of the connecting-rod F, which carries boXes f on the cross-head pin f', while the crank-pin d carries boxes cl12 of the other connecting-rod G, the other end of which carries boxes g on the cross-head pin g', which is held in position by the Bange g2, formed thereon, and the nut g3.

ilo

The shell C4 is fastened to the worm-well shell O14 by means of bolts C5, and the Wormwell shell C11 and said shell C4 clamp the bearing-bushings 7L and 7@,in which the Worm-shaft 71,2, provided with Worm H, turns, saidvworm meshing with the teeth of gear E. The Wormwell shell C14 forms the combined or partial support of the cross-head support B, the upper shell C', shell C4, carrying bearings for gear E, worm-shaft h2, and oil-Well h5. The Worm-well shell C14 is supported on brackets C15 and C15, held in position on the main bedplate I of the apparatus by means of connecting-bolts The bed-plate I at the opposite end supports the motor K, which is held in position on the bed-plate by means of bolts and @2, @s and @1, secured to brackets @19 and @20, which form a part of the loWer portion of the motor K, said motor consisting of magnetic cores @5 and @'6 and lower pole-pieces @7, and said brackets @19 and @'20 carrying boxes @21 and @22, respectively, which in turn carry bearing-bushes @23 and @24, respectively, in

. sition of the commutator, the commutatorwhich is journaled the sleeve 7c, upon which is mounted the armature 7d. The upper halves @'25 and @25 of the boxes @'21 and @'22 are secured to the latter by bolts @21. The armature 7o is of the familiar construction,.con sisting of laminated wrought-iron disks held by clamps 7a2 and 7a2, 7c1 representing a coil of armature-Winding and 705 showing the pobrushes or brush-holder not being shown. The upper pole-piece @8 of the motor is fastened to magnetic cores @5 and @5, respectively, by means of bolts @9, While pump-casing A, which is provided with su pportin g-brackets @10 and @11, is fastened to the pole-piece@8 by means of bolts @12, passing through said brackets.

The pump-casing A has'a suction-chamber at @1 3 and a delivery at @14 into coupling @15,- but this is immaterial, as any pumping mechanism for any fluid can be applied in place of the hydraulic pump here shown. Upon the pole-pieces @7 and @'s are Wound dat rectangular regulating-coils@15, which both magnetize or demagnetize, as the case may be, both the armature and the field-magnet cores @5 and @5. The field-magnet coils @17 and @18 are wound uponthe cores @5 and @5, so that the outer portions of the coils are about onehalf the thickness or horizontal width of the inner portions of the coils, for the purpose before stated, so that thel out-side Wires of the coils which are farthest from the armature are all effective in magnetizing the cores @5 and @5.

The boX @22 and its upper half @25, in which is fitted the bush @24, in which the armaturesleeve 7@ turns, are formed with an oil-groove @2S on the side toward the armature, into which extends the oil-bell @29, mounted on said armar ure-sleeve 7c. On the ends of the armature-sleeve 7c are fixed flanged hubs 775 and k7, the flanges of which support helical reliefsprin gs 7a2 and 7,59, respectively, the inner faces 0f said hubs being provided with annular,

grooves, in which bear balls 7612 and 7013, respectively, and the opposite bearings for said balls being in grooves of steel collars 701.5 and 71:17, respectively, which are arranged and bear upon the bushes @'23 and @21, in which the armature-sleeve 7c turns. The opposite end of the spring kg bears against ange 7018 of hub 7612, which is provided with `a iiange 7920, that bears against collar 7021 of part 714 of the worm-shaft h2, said flange 7a20 being bolted ,to the flange h5 by means of boltsph, this flange h5 being formed on hub 7@7, that is set on the end of the worm-shaft h2 by means of pin h2. The Worm-shaft 72,4 is provided with feathers 7@9 and 7710, preferably in two short parts for convenience in construction and which Workin their respective grooves 7711 and 7712 in the armature-sleeve 7o. These feathers may be made frictionless by the introduction of a series of balls on either side, as is evident Without particular illustration.

On the outer end of the Worm-shaft 774 is arranged a flanged hub h15, which is provided with a flange h11, that forms a support for the end of spring ks, the other side of which forms a bearingsurface for the knob or disk 7on the lower end of a bell-crank` lever 7', that is pivoted to the fork 75 of a bracket 74, Which is carried by the upper half @25 of 'boX @21. The hub 71,12 is also provided with flange 7@15, which forms the opposite bearing-surface for the disk 7 of the bell-crank lever 7. The upper half of the box @'25 also carries bracket 75 for the support of the regulation resistance-box L, which is slotted at 76 to admit the upper arm 77 of bell-crank lever 7.

Referring to Figs. 7 to 10, inclusive, particularly Fig. 7, the arm 7T of bell-crank lever 7 carries a rod 75, held in a hub or socket 710 of the bell-crank lever by means of a setscrew 79, said rod being insulated from 'said hub by insulation 711. The rod 7s carries brush 712, which in turn carries carbon blocks 713 at its outer end, Which blocks bear on the arc-shaped series of regulation-brushes O to 7 and O to 7. These carbon blocks are connected with the armature resistance-coils m, m', m2, m3, and m4 in series on either side of no-load position of the worm-shaft. (See Fig. l1.) The resistance terminal blocks 7 0 7', between which there is suitable insulation, are mounted on a support 714, arranged in box L and fastened to the bottom thereof by means of suitable bolts 715. The rod 7S, which is carried by the bell-crank lever 71, is furnished with a set-screw 715, by which connection is made with the armature-circuit in the case of the system of connection shown in Fig. 11.

IOO

IIO

On top of the box L is mounted a reversbrushes n3 and 'n'. The brushes 07,5 and n are made ot' one piece and are carried by one end of lever 97,10, from which the brushes are insulated by means of insulation 0111, said brushes W5 and n," being connected by means of rivets w12 to said lever. The brushes 017 and ns are also of one piece, being insulated from the lever n10 by the insulation w11 and cczgnnected to said lever by means of rivets 'n the opposite end of lever n10, is merely for the purpose of equalizing the pressure of brushes 91,5, n", H7, and ns and has no flinction to perform electrically. The lever 71,10 is mounted on a central pin 07,13, which is secured to the top of the resistance-box Z by means of a nut and washer p' and a collar p2 on said pin, while the lever is confined on the pin by means of a nut p. The hub of the lever n10 furnishes a bearing for the hub 'm14 of lever 'n1-1, which is provided with a plate w16, that connects the brushes 91,4 and n1. The lever 'n10 is turned by means of a knob w18, and the lever 72,15 is turned by a knob 97,17, which knob connects the latter with plate 01,16, between which the insulation w11 is inserted. The lever n10 carries pawl n19,which is held by means of a spring 7122 against the teeth m20 of a circular ratchet frz-21, that is arranged concentrically within the contact-ring n2, said pawl w19 having its fulcrum on screw w23, while spring '17,22 is held in position by means of screw H24. rllhe ratchet w21 is held in position by screws p3 and carries a movable stop p4, which is fulcrumed on screw p5, upon the rear projecting fork p6 of which stop rests a spring p7, held by screw p8.

In both systems shown in Figs. 11 and 12 and in which W indicates the generator the shunt-wound motor is used,- the circuit-ter minals being shown at 7' r', where the current divides, part flowing through the shunt-coils L17 and part through the armature Zt" and the seriesV coils i1". The terminals from the se ries coils are connected to contact-block 8 of the switch and with terminal r, the block 8 being in turn connected to the inner ring 92,2, which is in constant connection with the brush 77:1, which moves over it. The returnblocks 9 and 10, 26 and 27, 10 and 11, 27 and 2S, 11 and 12, 28 and 29, 12 and 13, 29 and 30, 13 and 14, 30 and 31, 14 and 15, 31 and 32, 15 and 16, 32 and 33, and 16 and 17, 33 and 34 are provided with armature-resistances m7, 'm8, fm, m10, m11, m12, m13, and m11. The block 17 is connected to blocks 22, 34, and 1, where by means of brushes 'a5 'a6 blocks 1 2 are connected, the latter being connected with commutator-brush r2 and block 18, and commutator-brush r3 being connected with brush Z112, which bears upon the resistance terminal blocks in the box L. The resistances m, m', 'm2, and m3 are now in series between blocks O, 1', 2', 3', 4' and O, 1, 2, 3, and 4, respectively, blocks 4 and 4' being connected to blocks 21 and 4 of switch N, while by means of brushes n1 and 'as blocks 4 and 5 are con` The brush n3, which is arranged uponl nected, the block 5 being connected to the terminal fr and block 1.9

The system shown in Fig. 12 is similar to that just described and shown in Fig. 11, with the exception that the series coils 1216 are shown in part connected to blocks 7, 6, 5, 4, 3, 2, 1, o, 1', 2', 3', 4', 5', c', and 7', with the block 8 of the switch connected to brush Z12, which is carried by the lever Z. Blocks 4 and 4' in box L are connected to terminal fr and commutatorbrush r3 is connected to blocks 4 and 21 of the reversing startingswitch, with the result that the current is only reversed through the armature, the direction of the current in the series coils being the same in all cases, as is the resistance in the armature-circuit-that is to say, m7, m8, m9, m10, m11, m12, m13, and m14.

The working circuits of the reversing starting-switch may be briefly described as follows:

Referring to Fig. 11, starting with terminal r the current from the generator WV is divided, part going through motor-field coils 7117 to terminal r' and part going through series coilsv 711" to block 8, to ring n2, through brush n4 and plate n1 to brush ng, to block 9, (brush fn" being on block 9, see dotted lines,) through the resistance m7, m8, mi', m10, m11, m12,m13,and m14 to block 17, to block 1, through brushes ni and n to block 2, to commutatorbrush r2, through armature 7c' to comm utatorbrush r3, to brush Z13, to block 0, through dynamo-metric regulating resistances m fm m2 m3 to blocks 4 or 4', to block 4 of the starting-switch, and through brushes 97,7 and ne to block 5, to terminal r', back to generator W. In the second position, in which brush n" is on block 26, and, at the same time, brushes n and n", n1 and u8, are respectively on blocks 18 and 19, 21 and 22, the circuit is as follows: Starting with terminal r the current from the generator W is divided,part going through motor-eld coils '1117 to terminal 7" and the other part going through series coils 16 to block S, to ring n2, through brush n1 and plate n1 to brush fn", to block 26, through block 9 and resistances m1, m3, m9, m10, m11, m12, m13, and m11 to block 17, to block 22, through brushes ns and nf (then on blocks 21 22) to block 21, to either blocks 4 or 4' of the dynamometric regulating-resistance, through resistances 'm3 m2 m' m to block o, to brush Z13, to commutator-brush r3, through armature 7c' (in opposite direction to hitherto-described circuit) to commutator-brush r2, to block 18, through brushes nf and n1; (then on blocks 18 19) to block 19, to terminal o", `and back to generator W.

Referring to Fig. 12 and starting at terminal r, the current from W is divided, part going through motor-field coils 17 to terminal r' and part going directly to either blocks 4 or 4', through the dynalnometric series regulating-coils 1111i to block 8, to ring n2, through brush n1, plate n1, and brush n1 to block 9, (see dotted lines,) through resistances m7, m11,

IIO

m9, m10, m11, m12, m13, and m14 to block 17, to block 1, through brushes m5 and n to block 2, to comm utator-brush r2, through armature k' to commutator-brushrs, to block 4, through brushes 717 and 'ns to block 5, to terminal r', and vback to generator W. In the second position, in which brush n is on block 26 and brushes 715,116 and 'n1 its are respectively on blocks 18 19 and 21 22, starting with terminal r the current from the generator W is divided, part going through motor-field coils 7117 to terminal r' and part going to blocks 4 or 4 through the dynamometric series regulating-coils @'16 to block O, through brush 13 to block 8, to ring n2, through brush n4, plate n1, and brush '71,9 to block 26, to block 9,

'through resistances 'm7 m8 m9 m10 m11 m12 m13 m14 to block 17, to block 22, through brushes 'ns and 'a7 to block 2l, to commutator-brush r3, through armature It (in opposite directions to that just before described) to commutator-brush r2, to block 18, and through brushes m5 and n@ to block 19, to terminal r', and back to generator.

The starting device, the dynamometric regulation, and consequently the operation of the pump and operating mechanism can be best described by beginning with the reversing starting-switch. The reversing-switch n10, with its brushes m5, n, n?, and ns, being in the position shown in Fig. 11, the current in the armature-circuit will be broken between the brush n1 and block 9. The dynamometric regulation-brush Z12 is in the position 'of no load on the motor, that position of the brush corresponding to the intermediate position of the 'relief-springs las and k1), which act on the worm-shaft. In this position the springs exert either no pressure or both exert the same pressure-that is to say, they neutralize each other. The current in the armature-circuit is now completed by moving theHV brush from block 8 to block 9. The current is shunted at r, part going through the fieldcoils 17 to terminal fr and part going through the series coils 1516,' from which the line passes to block 8. Block 8 is connected to contactring n2 by a wire, as shown, and this ring having continuous contact with the brush n4, then when brush 'a9 is moved from block 8 to block 9 the circuit through the armature is completed in one direction, taking in the resistances, respectively, m7 to m14 and the dynamometric regulating-resistance fm to m4. The resistance m7 to m14 is now gradually cut out, as the motor rises to speed, by moving brush 'ng to block 17 in a clockwise direction, a movement in anticlockwise direction past block 9 being prevented by stop p4, so that the current must now be broken by moving brushes 'm5, n, a7, and 'ns where circuit is broken lbe- (from right to left, it may be said,) then to brush Z13, from whence it goes through resistance m, m', m2, and m3, then to block 4 of the reversing starting-switch, where, by means of brushes m7 and m8, it passes to block 5, from which it passes to shunt-terminal r'. The maximum load having been gradually applied as the speed of the motor increases, the smallest possible starting-current will be used. The load at any time being exerted by the gear to the worm and transmitted by the latter to the relief-springs, the travel of the worm-shaft is proportionate to the load applied to the motor by the pump-plungers. Should at any time the load be suddenly increased, the working or relief spring responds at once, and the resistance m4, m5, and m11 is thrown into the armature-circuit, so as to prevent any increased current from owing through the armature. Should the load be suddenly taken off the motor,resistances m,m,m2, and m3 are thrown into circuit and the speed thereby reduced. As the lever n15,which carries the block a9, passes over the space between the blocks 8 and 9 the stop p4 prevents the circuit from being broken by any anticlockwise rotation of lever 1115 beyond block 9 or 26, while in order to regulate the speed of the motor the said lever has a range from block 9 to.

block 17, it being prevented from being turned farther by inert brush n3, carried by lever n10. In order to stop the motor, the lever 77.15 is turned anticlockwise until the stop is reached. The resistances m7 to m14 are now thrown in circuit, and the circuit cannot be broken otherwise than by moving lever n10, which carries reversing-brush m5, ne, m7, and a8 in a clockwise direction, the ratchet m21 and pawl 71,19 preventing any anticlockwise movement. The reduced current is thereby broken between blocks l and 2, and the motor has now been stopped under load, and in order to again start the reversing-lever n10 is turned,

taking along with it the lever 7215 to the corresponding position diametrically opposite, where the current in the armature is reversed by contact of brushes 'm5, n, 917, and 'n.8 wit-h blocks 18, 19, 21, and 22, respectively. In order to complete 'the circuit aga-in, the brush n1 is moved to block 26. Beginning again at the shunt-terminal r the current flows to block 8, then to contact ring n2 through brush 71,9 and into block 26, through resistances m7 to m14, inclusive, to block 22, through brushes frv'to block 21, then through resistances m, m', m2, and m3, respectively, to brush Z13, then to armature commutatorbrush r3, through armature lo (from left to right, it may be said) to armature commutator-brush r2, then to plate 18 through brushes a5 and n into block 19 to shunt-terminal r'. The compressed relief -spring of the wormshaft is now gradually expanded with slight load, gradually decreasing until the spring is entirely expanded, when the motor will reach its speed before' the full load is applied by the opposite relief-spring.

The second system of regulation (shown in ICO IIO

Fig. 12) is obtained by the series coils 716, with the reversing starting-switch operating the same as before described, allowing the cnrrent in the armature-circuit in the series field to pass in the same direction, regardless of the direction of the current in the armature. The series coils s, s', s2, s3, s4, S5, and s6 are connected inseries to the dynamometric regulating-blocks O l and 0 l', 1 2 and l' 2', 2 3 and 2 3', 3 at and 3' 4', 4 5 and 4' 5', 5 6 and 5' 6', and 6 7 and 7'. The blocks Atand 4' of the dynamometric regulating-blocks at the lower part of the iigure are connected with the terminali1 and the brush P2, the carbon block 0f which (shown as on the zero-block 0) is connected with the block S of the reversing starting-switch N. In starting theV motor without load the series coils s s s2 s3 are eX- erting a magnetizing effect upon the armature and field magnets, and their magnetic effect is gradually decreased as the load increases with the speed, by reason of course of the action of the worm-shaft on the brushactuating lever l'. If the motor is running under load and the carbon blocks of the brush-Z12 have passed to or near the blocks et and 4', the series-coils are cut out. 1f when the motor is running under loadthe load for some unforeseen reason is increased, the coils s", S5, and s6 are thrown in the armature-circuit, the increased current in which exerts a deinagnetizing effect upon the armature and the field-magnet cores and brings the speed back to its normal running position. On the other hand, if the load should be suddenly thrown off the motor the carbon blocks of brush P2 will move inwardly toward the block a, and the series coils S3, s2, s', and s are thrown in the circuit and exert a magnetizing effect, and the motor will then be running light with no current running through the armature and the iield magnetism atits maximum value or position.

The great advantage of this electric pump is that a motor is obtained which can be started without load, thereby taking the smallest possible starting-current. The use of reliefsprings will prevent any sudden jarsuch as that caused, for instance, by Water-hammer or slamming of the valves common in pump machinery generally-from being thrown suddenly on the motor or on the pump-driving mechanism, which would otherwise squeeze out the lubricant of the gearing and greatly increase the wear of the working parts. The automatic dynamometric system of regulation prevents the motor from being affected by any sudden increase of current which would otherwise iiow through the armature from any sudden increase of load. The automatic regulation also protects the motor against any racing that might occur by suddenly throwing the load o the motor. This system of regulation might also very readily be made, so as to automatically stop the motor under certain pressure, and thereby adapt the machine to hydraulic-pressure service or hydraulic-elevator service, and thereby do away with an inefficient boiler and steampump in many cases where an electric current is attainable and a hydraulic elevator is desirable over the electric.

The complete machine takes up about the same area as a hydraulic duplex pump of similar capacity and does the saine work with only about fifty per cent. of the power of the former. It is evident that the construction can also be used with air or gas compressors or other huid-pumps with equal advantage.

Having thus described my invention, what I claim isl. The combination, with an electric motor, provided with vertical field-magnet cores, of the incased pumping mechanism driven by said motor, the casing being supported by said field-magnet cores, and the piston-rods and armature-shaft being substantially parallel, a worm connected with the armatureshaft, and a suitably-supported gear-wheel intermeshing with said worm and connected with the piston-rods of the pumping mechanism, substantially as set forth.

2. The combination, with an electric motor, havingahorizontal armature-shaft, of apump provided with horizontal cylinders and pistous and mounted on a pole-piece of the motor, the piston-rods being also horizontal and extending in the same direction as the armature-shaft, a worm connected with the armature shaft, and a suitably-supported gearwheel intermeshing with said worm and connected with the pistons of the pumping mechanism, substantially as set forth.

3. The combination with an electric motor having a longitudinally-yielding shaft for driving the armature, of pumpingmechanism and gearing connecting said shaft with the pumping mechanism whereby a exible coupling is obtained between the motor-shaft and the pumping mechanism, substantially as set forth.

4. The combination, with an electric motor, of a driving-shaft, and a relief-spring arranged to act on the armature-shaft of the motor through said driving-shaft, substantially as set forth.

5. The combination, with an electric motor, the armature of which is mounted on the shaft of said motor, of an auxiliary longitunally-movable driving-shaft, and a reliefspring arranged between the armature-shaft and the auxiliarydriving-shaft, substantially as set forth.

6. Thefcombinatiomwith an electric motor, of pumping mechanism, and means for transmitting motion from the armature of the motor to the pumping mechanism, the same comprising a spring-controlled Worm-shaft movable longitudinally of the armature, and a gear intermeshing with the worm of the shaft and transmitting motion from the latter to the pumping mechanism, substantially as set forth.

7. The combination,with an electric motor,

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618,404 .fz y

the armature of which is mounted on the shaft thereof, of an auxiliary driving-shaft,

l relief-springs mounted between the armatureshaft and the auxiliary driving-shaft, and frictionless thrust-bearings between the armature-shaft and the bearings of the same, substantially as set forth.

8. The combination, with the pumpingmechanism, and the gear-casing forming the support of part of the driving mechanism of the same, of a motor, and a gear and Worm turning in said casing, said worm having a combined worm and ratchet motion, substantially as set forth.

9. The combination of the pumping mechanism, `and the motor, on one of the polepieces of which the casing of said pumping mechanism is supported; with means for communicating motion from the armature of the motor to the pumping mechanism, the same comprising a worm-shaft having the characteristics of both a worm and a ratchet or rack,

means for yieldingly supporting said wormshaft in a longitudinal direction, and a gear intermeshed by the worm and transmitting motion to the pumping mechanism, substantially as set forth.

10. The combination, with an electric motor, pumping mechanism, and means for transmitting motion from the motor to the pumping mechanism, the same comprising a worm and gear, of the housing or casing for said worm and gear, which is constructed to form brackets for'the support of the gearshaft bearings and the worm-shaft bearings, substantially as set forth.

1l. The combination, with the oil-Well, and a Worm running in said oil-well, of a housing, and a gear running in said housing and meshing with said worm, said gear being provided with means whereby the oil taken from the well is returned from the gear to the well, substantially as set forth.

12. The combination, With the oil-well, and

a Worm running in said oil-well, of a housing, and a gear running in saidhousing and meshing with said worm, said gear being provided with an annular groove near its peripheral teeth, whereby the oil is returned to the well, substantially as setforth. 13. Agear,provided with an annular groove near its teeth for returning the lubricant for the teeth and preventing the same from passing onto the gear-shaft, substantially as set forth.

14. The combination, with a motor, and a worm driven by the shaft of said motor, of a gear driven by said worm and provided with cranks which are attached to and form a part of the gear on each side, said cranks carrying in turn the journaled shafts, substantially as set forth. I

15. The combination, With'an electric motor, the armature of which is mounted on the shaft of said motor, and an auxiliary longitudinall y movable drivingshaft, of reliefsprings mounted between the armature-shaft and the auxiliary shaft, the expansion and contraction of which springs furnish a system of dynamometric regulation for the motor; substantially as set forth.

16. The combinatiomwith an electric motor, and a sleeve-shaped shaft onwhich the armature of the motor is mounted, of an auxtor, of field-coils Wound on the magnetic poles, the thickness of the coils on one side being in a fixed ratio to the thickness of the same coils on the opposite side,while the depth of the coils on one side is in a fixed inverse ratio to the depth of the coils on the opposite side, as and for the purpose specified.

18. The combination of a motor, iield-coils wound on the magnetic poles so that the thickness of the coils on one side is in a ixed ratio to the thickness of the same coils on the opposite side, while the depth of the coils on one side is in a fixed inverse ratio to the depth of the coils on the opposite side, and flat, rectangular, series coils for magnetizing or demagnetizing the armature field-magnets byv means of dynamometric regulation, substantially as set forth.

19. The combination of a shunt wound electric motor, a reversing starting-switch in the armature-circuit of said motor, whereby the circuit in the armature is reversed before starting, and an independent set of resistances in the armature-circuit, the automatic dynamometric variation ofwhich produces the regulation of the said motor, substantially as set forth.

20. The combination of an elect-ric motor, a r`eversing starting-switch composed of an annular range of blocks, a concentric ring, starting-resistances between the said blocks and the concentric ring, and contact-brushes forming contact between said ring and blocks, whereby the current in the armature of said motor after stopping is reversed before the circuit can again be completed, substantially as set forth.

21. The combination, with an electric motor, the armature of which is mounted on the shaft thereof, of an auxiliary longitudinallymovable driving-shaft turned by the shaft of the armature, a relief-spring acting on said auxiliary shaft, a series of resistance-blocks, and a traveling brush actuated through the medium of 'said auxiliary drivingshaft, whereby more or less resistance is thrown in the circuit, substantially as set forth.

22. The combination, with an electric mo- IOO IIO

tor, and a spring-controlled and longitudimyinvention I'have signed myname in presnallymovable powertransmitting shaft, ence of two subscribing Witnesses.

movable relatively to the armature of a se- 1 7 ries of resistance-blocks, and a traveling CARL EICKEMB ER 5 brush moved across said blocks, under the Witnesses:

action of said shaft, substantially as set forth. GEO. EICKEMEYER,

In testimony that I claim the foregoing as VJAMES S. FITCH. 

